Need help diagnosing rough idle

Just got back from a 3500 mile road trip from Oklahoma through CO and WY.
The truck (4 cylinder AT 4x4) ran great the whole trip. Now back home and the truck has a rough idle and has rough acceleration but only when I'm going slow. Still runs fine at high speeds.
I always worry about the transmission on the 4 cylinder AT in the mountains and hope I didn't damage it on the mountain passes.
I am not mechanically inclined and am wondering if there is any other parts of the truck that could be the culprit.

any ideas?

thanks for the help

 

mileage?
dirty air filter?
dirty throttle body?
dirty maf sensor?

all 3 of those could be the culprit and are all easy to change / fix.

 

Awesome Thanks, Ill check those out.

Mileage is 85k